I need to find a way to communicate this in MC without getting angry or frustrated.
I'll take issue with that. If you're angry, your angry, and it's OK to show it. MC is, I think, a good place for that, since you both have protection there.
BTW, if our post-D-Day experience were like yours, I'd be angry if my W were asking for much trust, too. It indicates to me she's not owning her actions. Step 1 in rebuilding trust is acknowledging responsibility for the A and its impact.
I'm 28 months out, in a good R, and our MC says lack of trust at this stage is normal. Your W needs to accept she needs to rebuild trust, and it will take a long time.